| association between ecological factors and the presence of rhipicephalus (boophilus) microplus larvae in puerto rico. | a prevalence study was conducted to survey tick larvae populations in puerto rico (pr), compare the number of infested sites with rhipicephalus (boophilus) microplus larvae between the wet and dry season, and assess the associations of ecologic factors on the presence of r. microplus larvae. ninety-six sites were selected using a gis-based sampling method. each site was sampled twice; the first sampling was performed during the dry season (march 4-18, 2007) and the second sampling during the wet ... | 2012 | 22638941 |